All through the book of Romans!
From Romans 15 and 16
Reference Hebrews 12:1-3
Doing hard things is difficult; doing hard things alone is much more challenging. Yet God does not leave us alone; there is a great cloud of witnesses whose stories he has preserved for our encouragement. He gives us brothers and sisters who run alongside us. And our eyes turn toward Jesus, who has blazed the trial of seeking glory through suffering.
Hudgins, Jacob. Exploring God’s Grace: A Five Day a Week Devotional about a Good God (p. 526). Kindle Edition.